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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5d8785ebe0b420f80b6003df06cfd8f3e1ef3f00c782a9b983187872e73d77c' 
  AND token = 'a+oTDkzW8ShC/xOv1fGErMt4QHX4g4Z10SbuSSv5460=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}